Which of the following criteria is acceptable in determining the quality of a peripheral blood smear

A peripheral blood smear that covers only a quarter of the slide is insufficient for comprehensive analysis. This limited coverage does not provide enough material for evaluating various cellular components and may overlook critical abnormalities, rendering the smear inadequate for diagnostic purposes.

While covering the entire slide might seem beneficial, it can lead to excessive overlap of cells, making it difficult to accurately assess the morphology of individual blood cells. An ideal smear should have a feathered edge that allows for clear visibility of different cell types without overcrowding, which is not achieved when the smear covers the entire slide.

A feathered edge is a desirable characteristic in a blood smear because it allows for the assessment of cell morphology, but it is not the defining criterion for quality. The feathered edge should be present along with a well-defined edge to ensure that the smear is both informative and diagnostically useful.